634533836 has 6 divisors (see below), whose sum is σ = 1110434220. Its totient is φ = 317266916.

The previous prime is 634533817. The next prime is 634533839. The reversal of 634533836 is 638335436.

It is a junction number, because it is equal to n+sod(n) for n = 634533793 and 634533802.

It is not an unprimeable number, because it can be changed into a prime (634533839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79316726 + ... + 79316733.

It is an arithmetic number, because the mean of its divisors is an integer number (185072370).

Almost surely, 2^634533836 is an apocalyptic number.

It is an amenable number.

634533836 is a deficient number, since it is larger than the sum of its proper divisors (475900384).

634533836 is a wasteful number, since it uses less digits than its factorization.

634533836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158633463 (or 158633461 counting only the distinct ones).

The product of its digits is 466560, while the sum is 41.

The square root of 634533836 is about 25189.9550614923. The cubic root of 634533836 is about 859.3134217316.

The spelling of 634533836 in words is "six hundred thirty-four million, five hundred thirty-three thousand, eight hundred thirty-six".